package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dao.DishDao;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate<Object,Object> redisTemplate;

    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        Set keys = redisTemplate.keys("dish*");
        redisTemplate.delete(keys);
        return R.success("新增菜品成功");

    }

    @GetMapping("/page")
    public R pageR(Integer page,Integer pageSize,String name){
        Page<DishDto> dishDtoPage = new Page<>();
        Page<Dish> dishPage = new Page<>(page,pageSize);
        LambdaQueryWrapper<Dish> qw = new LambdaQueryWrapper<>();
        qw.like(StringUtils.isNotEmpty(name), Dish::getName,name);
        qw.orderByDesc(Dish::getUpdateTime);
        dishService.page(dishPage, qw);
        BeanUtils.copyProperties(dishPage, dishDtoPage,"records");
        List<Dish> records = dishPage.getRecords();
        List<DishDto> list = records.stream().map(item -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Category category = categoryService.getById(item.getCategoryId());
            if (category != null) {
                dishDto.setCategoryName(category.getName());
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);
    }

    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);

        return R.success(dishDto);
    }

    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);
        //清空缓存
        Set keys = redisTemplate.keys("dish*");
        redisTemplate.delete(keys);
        return R.success("修改菜品成功");
    }

    @DeleteMapping
    public R delete(@RequestParam List<Long> ids){
        for (Long id : ids) {
            log.info(id.toString());
        }
        dishService.removeByIds(ids);
        dishFlavorService.removeByIds(ids);
        return R.success("删除成功");
    }
    @PostMapping("/status/{status}")
    public R<String> state(@PathVariable Integer status,@RequestParam List<Long> ids){
        LambdaUpdateWrapper<Dish> qw = new LambdaUpdateWrapper<>();
        qw.set(Dish::getStatus,status);
        qw.in(Dish::getId,ids);
        dishService.update(qw);
        for (Long id : ids) {
            Dish dish = new Dish();
            dish.setId(id);
            dish.setStatus(status);
            dishService.updateById(dish);
        }
        return R.success("修改成功");
    }
    @GetMapping("/list")//查询菜品方法修改
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList = null;
        //动态构造key
        String key = "dish_"+dish.getCategoryId()+"_"+dish.getStatus();
        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if (dishDtoList != null) {
            //如果存在.直接返回,无需查询数据库
            return R.success(dishDtoList);
        }
        //根据分类id查询该分类下的所有菜品集合
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus,1);
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);
        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String name = category.getName();
                dishDto.setCategoryName(name);
            }
            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
            List<DishFlavor> dishFlavors = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavors);
            return dishDto;
        }).collect(Collectors.toList());
        //如果不存在,需要查询数据库,将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key, dishDtoList, 60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }

}
